Infrared spectroscopy of the surface of thermally-modified teak juvenile wood

Abstract: During the thermal modification of the wood there is a decreasing gradient of temperature from the surface to its interior, therefore, the most severe chemical modifications occur on the surface. These chemical modifications directly affect the quality and durability of adhesives and coati...

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Autores principales:	Lopes,Juliana de Oliveira, Garcia,Rosilei Aparecida, Souza,Natália Dias de
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2018
Materias:	Cellulose crystallinity chemical modification heat treatment quinone derivatives Tectona grandis.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2018000400737
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spelling	oai:scielo:S0718-221X20180004007372019-02-14Infrared spectroscopy of the surface of thermally-modified teak juvenile woodLopes,Juliana de OliveiraGarcia,Rosilei AparecidaSouza,Natália Dias de Cellulose crystallinity chemical modification heat treatment quinone derivatives Tectona grandis. Abstract: During the thermal modification of the wood there is a decreasing gradient of temperature from the surface to its interior, therefore, the most severe chemical modifications occur on the surface. These chemical modifications directly affect the quality and durability of adhesives and coating. Therefore, this study investigated the chemical modification of the surface of thermally-modified teak juvenile wood. Heartwood and sapwood samples were treated at 180 and 200ºC. Chemical analyses were performed by Fourier transform infrared spectroscopy (FTIR) in reflectance mode with a microscope. Spectra showed an increase in cellulose crystallinity and a decrease in relative contents of hydroxyl groups, lignin and extractives - especially quinones, waxes and oils - following thermal modification. Extractive content of the heartwood was relatively higher than that of sapwood. Heartwood was more susceptible to thermal degradation than sapwood.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.20 n.4 20182018-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2018000400737en10.4067/S0718-221X2018005041901
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Cellulose crystallinity chemical modification heat treatment quinone derivatives Tectona grandis.
spellingShingle	Cellulose crystallinity chemical modification heat treatment quinone derivatives Tectona grandis. Lopes,Juliana de Oliveira Garcia,Rosilei Aparecida Souza,Natália Dias de Infrared spectroscopy of the surface of thermally-modified teak juvenile wood
description	Abstract: During the thermal modification of the wood there is a decreasing gradient of temperature from the surface to its interior, therefore, the most severe chemical modifications occur on the surface. These chemical modifications directly affect the quality and durability of adhesives and coating. Therefore, this study investigated the chemical modification of the surface of thermally-modified teak juvenile wood. Heartwood and sapwood samples were treated at 180 and 200ºC. Chemical analyses were performed by Fourier transform infrared spectroscopy (FTIR) in reflectance mode with a microscope. Spectra showed an increase in cellulose crystallinity and a decrease in relative contents of hydroxyl groups, lignin and extractives - especially quinones, waxes and oils - following thermal modification. Extractive content of the heartwood was relatively higher than that of sapwood. Heartwood was more susceptible to thermal degradation than sapwood.
author	Lopes,Juliana de Oliveira Garcia,Rosilei Aparecida Souza,Natália Dias de
author_facet	Lopes,Juliana de Oliveira Garcia,Rosilei Aparecida Souza,Natália Dias de
author_sort	Lopes,Juliana de Oliveira
title	Infrared spectroscopy of the surface of thermally-modified teak juvenile wood
title_short	Infrared spectroscopy of the surface of thermally-modified teak juvenile wood
title_full	Infrared spectroscopy of the surface of thermally-modified teak juvenile wood
title_fullStr	Infrared spectroscopy of the surface of thermally-modified teak juvenile wood
title_full_unstemmed	Infrared spectroscopy of the surface of thermally-modified teak juvenile wood
title_sort	infrared spectroscopy of the surface of thermally-modified teak juvenile wood
publisher	Universidad del Bío-Bío
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2018000400737
work_keys_str_mv	AT lopesjulianadeoliveira infraredspectroscopyofthesurfaceofthermallymodifiedteakjuvenilewood AT garciarosileiaparecida infraredspectroscopyofthesurfaceofthermallymodifiedteakjuvenilewood AT souzanataliadiasde infraredspectroscopyofthesurfaceofthermallymodifiedteakjuvenilewood
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Infrared spectroscopy of the surface of thermally-modified teak juvenile wood

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